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Let's assume the length of the given string as N. Therefore, index range for each character in the string is: [0,N-1]
Lets's assume the desired random triplet is represented as XYZ. Also, let's assume Ix,Iy, and Iz denote randomly chosen indices for characters X, Y, and Z respectively. As per the given condition:
Ix = [0, N-3]
Iy = [ Ix+1, N-2]
Iz = [ Iy+1, N-1]
The psuedo code is:
- vcs005 July 22, 2014